Home / 15,687.36-21,652.32-11,966.40

Finding the Fourth Proportional to 15,687.36, 21,652.32 and 11,966.40

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Solution

The fourth proportional to 15,687.36, 21,652.32 and 11,966.40 is: 16,516.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.36 : 21,652.32 = 11,966.40 : x
  2. Step 2: Convert to fraction form
    15,687.36/21,652.32 = 11,966.40/x
  3. Step 3: Cross multiply
    15,687.36x = 21,652.32 × 11,966.40
  4. Step 4: Simplify right side
    15,687.36x = 259,100,322.05
  5. Step 5: Solve for x
    x = 259,100,322.05/15,687.36
  6. Step 6: Final answer
    x = 16,516.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.